Mathematics questions and answers

Mathematics Questions and Answers

How good are you with figures and formulas? Find out with these Mathematics past questions and answers. This Test is useful for both job aptitude test candidates and students preparing for JAMB, WAEC, NECO or Post UTME.

2,181.

Simplify \(\frac{1\frac{1}{2}}{2 \div \frac{1}{4} \text{of } 32}\)

A.

\(\frac{3}{256}\)

B.

\(\frac{3}{32}\)

C.

6

D.

85

Correct answer is C

\(\frac{1\frac{1}{2}}{2 \div \frac{1}{4} \text{ of }32}\)

= \(\frac{\frac{3}{2}}{2 \div \frac{1}{4} \times 32}\)

\(\frac{3}{2} \times 4 = 6\)

2,182.

For which of the following exterior angles is a regular polygon possible? i. 35° ii. 18° iii. 15°

A.

i and ii

B.

ii only

C.

ii and iii

D.

iii only

Correct answer is C

for a regular polygon to be possible, it must have all sides angles equal. \(\frac{360}{18}\) = 20 sides and \(\frac{360}{15}\) = 24 sides

(ii) and (iii) are right

2,183.

Four interior angles of a pentagon are 90o - xo, 90o + xo, 110o - 2xo, 110o + 2xo. Find the fifth interior angle

A.

110o

B.

120o

C.

130o

D.

140o

Correct answer is D

Let the fifth interior angle be y: sum of interior angle of a pentagon

= (2 x 5 - 4) x 90o

= 6 x 90o

= 540o

(90 - x) + (90 + x) + (110 - 2x) + (110 + 2x) + y = 540o

400o + y = 540o

y = 540 - 400o

y = 140o

2,184.

If x is the addition of the prime numbers between 1 and 6; and y the H.C.F. of 6, 9, 15. Find the product of x and y

A.

27

B.

30

C.

33

D.

90

Correct answer is B

Prime numbers between 1 and 6 are 2, 3 and 5 x = 2 + 3 = 5 = 10 H.C.F. of 6, 9, 15 = 3 ∴ y = 3 X x y = 10 x 3 = 30